User Guide
Table Of Contents
VU53F,N,S,T; VU54F,N,S,T; VU443A; VU444A; VU843A; VU844A 
FAN COIL VALVES AND ACTUATORS 
SPECIFICATION 
ACTUATOR 
VALVE 
Models:
 VU443, VU843: for use with VU53 2-way valves. 
VU444, VU844: for use with VU54 3-way valves. 
Actuator Electrical Rating & Connection:
 10 VA Maximum 
Model 
Control Circuit 
Current 
Draw (A) 
Connection/Leads 
Type 
VU443A 
VU444A 
120V, 60Hz  0.07 
6" motor leads 
standard. 
18", 36" or 96" 
Leadwires 
optional. 
2-WAY, Normally 
Closed; or Open; 
(VU443A,VU843A) 
3-WAY, Diverting; 
or Mixing; 
(VU444A,VU844A) 
VU843A 
VU844A 
24V, 50-60 Hz 
0.32 
 Note: Motors for all the above models are Class A, Plated. 
Maximum Ambient @ Fluid Temperature Rating:
 Standard models (with class A motor):
 •104°F(40°C) ambient @ 200°F(94°C) fluid. 
Minimum Ambient Temperature:
 34°F(1°C) 
Shipping and Storage Temperature: 
-40°C to 65°C (-40°F to 150°F). 
Atmosphere: 
Non-corrosive, non explosive, condensing. 
Noise Rating:
 Low Noise - non obtrusive. 
Materials:
 Case:  stainless steel. 
 Cover: aluminum. 
 Sector gear: reinforced with KEVLAR®brand fiber. 
KEVLAR® is a Dupont registered trademark. 
Dimensions: 
See Fig. 1. 
ORDERING INFORMATION 
Models:
 VU53: 2-way, normally closed valves. 
 VU54: 3-way diverting valves. 
Valve Styles, Sizes, Flow Capacity Rating (C
v
)& Maximum 
Close-off Pressure Rating (psi): 
Pipe 
Connections 
Flow 
Capacity 
Rating 
Maximum 
Closeoff 
Pressure* 
Model 
Type 
End Fittings 
Size 
C 
v 
k 
v 
psi  kPa 
VU53S 
2-WAY 
Normally 
Closed 
SWEAT 
1/2" 
3.5 
3.0  20  138 
3/4" 
3.5 
3.0  20  138 
3/4" 
8.0 
7.0  10  69 
VU54S 
3-WAY 
Diverting
SWEAT 
1/2" 
4.0 
3.4  20  138 
3/4" 
7.0 
6.0  12  83 
Max. Fluid Temperature:
 Standard Models (with Class A motor): 
•200°F(94°C) fluid @ 104°F(40°C) ambient. 
Min. Fluid Temperature:
 34°F(1°C) for all models. 
Max. Operating Pressure Rating:
 300 psi (2000 kPa), PN20. 
Flow Characteristics:
 Quick opening for on-off application. 
Material:
 Valve body: forged brass.
 Drive shaft stem:  brass.
 Ball plug:  Buna-N rubber.
 O-ring seals:  EPDM rubber. 
Service Medium:
 Suitable for hot and chilled water with up to 50% glycol. 
Dimensions: 
See Fig. 1. 
Approvals:
 CSA C/US Certified. 
For ordering information when purchasing replacement and modernization products from your TRADELINE® wholesaler or your 
distributor, refer to the TRADELINE® Catalog or price sheets for complete ordering number, or specify: 
1.  Order number. 
2.  Voltage and frequency. 
3.  Size and type of end connections. 
4.  C
v
 (k
v
) rating. 
5.  Lead length if different from standard. 
6. Replacement parts, if needed. 
If you have additional questions, need further information, or want to comment on our products or services, please write or 
phone: 
1.  Your local Honeywell Home and Building Control sales office (check white pages of phone directory). 
2.  Home and Building Control Customer Logistics 
Honeywell Inc., 1885 Douglas Drive North 
Minneapolis, Minnesota  55422-4386 (612) 951-1000 
In Canada—Honeywell Limited/Honeywell Limitée, 35 Dynamic Drive, Toronto, Ontario M1V 4Z9. International Sales and 
Service Offices in all principal cities of the world. Manufacturing in Australia, Canada, Finland, France, Germany, Japan, Mexico, 
Netherlands, Spain, Taiwan, United Kingdom, U.S.A. 
95C-10885 
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